1
Micro Exam 2 Portage Learning Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What type of microorganism has peptidoglycan in its cell wall?✔✔ Bacteria
What is the function of the bacterial capsule?✔✔ Prevents phagocytosis
What part of a bacterial cell is responsible for protein synthesis?✔✔ Ribosomes
What bacterial structure helps the cell attach to surfaces?✔✔ Fimbriae
What structure allows bacteria to move?✔✔ Flagella
- / 3
2
What is the name of the waxy substance in the cell wall of Mycobacterium?✔✔ Mycolic acid
What type of staining is used to identify acid-fast bacteria?✔✔ Ziehl-Neelsen stain
What kind of cell wall does a Gram-positive bacterium have?✔✔ Thick peptidoglycan layer
What color does a Gram-positive bacterium appear after staining?✔✔ Purple
What color does a Gram-negative bacterium appear after staining?✔✔ Pink
What part of the Gram-negative cell wall can act as an endotoxin?✔✔ Lipopolysaccharide (LPS)
- / 3
3
What is the purpose of iodine in a Gram stain?✔✔ Mordant to fix the dye
What is the counterstain used in the Gram staining process?✔✔ Safranin
What type of microscopy is needed to view viruses?✔✔ Electron microscopy
What part of a virus protects its genetic material?✔✔ Capsid
What viral structure helps it bind to host cells?✔✔ Spike proteins
What is the genetic material of most viruses?✔✔ RNA or DNA
- / 3